R
R
Model BRS-2T-24 Voltage Regulator
Operating Instructions
Page 1
The Balmar BRS-2T-24 voltage regulator is designed to be used in conjunction with 24-volt, positive excitation (P-
type) EXTERNALLY REGULATED alternators. The BRS-2T-24 voltage regulator provides an adjustable potentiometer
that allows control of the regulator's maximum voltage limit. Adjustment ranges from 26.5V to 29.5V. Factory
voltage setting is 27.5V.
When installing, the Balmar BRS-2T-24 should be mounted on a flat
surface in an area that provides ample room and airflow for cooling.
The regulator's footprint is 4.5 inches long by 2.9 inches wide.
Mounting tabs are provided at each end of the regulator's heat sink.
The BRS-2T-24-H is provided with a 54" long sheathed wiring
assembly. Wiring is pre-installed on the regulator prior to shipping.
The BRS-2T-24 voltage regulator with wiring harness is installed with a
24-volt alternator as follows:
1. RED Power Wire - The regulator's power wire must always see voltage
at the battery being charged. The RED wire can be connected to
one of the following locations; a) alternator's positive output post; b)
directly to battery's positive post; c) to the common side of a multi-
position battery switch (if used), d) in the case of applications using
diode-based battery isolator to distribute charging
output, the RED power wire must be connected on
the battery side of the isolator. The power wire MUST
be fused at 10A.
2. BROWN Ignition Wire - The ignition wire must provide
voltage to the regulator whenever the engine is
running. Voltage can be supplied directly from the
ignition switch, or through an oil pressure switch.
3. ORANGE Stator Wire - The stator wire provides an AC
pulse to the regulator from the alternator's AC Tap as
shown at right. Connect the ORANGE wire to the
terminal indicated as "AC Tap / Stator".
4. BLUE Field Wire provides excitation current to the
alternator and must be connected to the "Field
Terminal" as indicated on the alternator diagram.
5. BLACK Ground Wire provides the regulator with a
connection to system ground, and must be
connected for proper operation. The BLACK wire
should be connected to the alternator's "Ground
Post" indicated in the diagram at right.
CONNECTING REGULATOR TO A 24-VOLT ALTERNATOR
INTRODUCTION
INSTALLATION
FIELD
Blue
STATOR
Orange
ORANGE
Stator Active
YELLOW
Field Active
GREEN
Power On
POWER
Red
IGNITION
Brown
GROUND
Black
Voltage
Adjustment
Pot
NOT
USED
D+ Terminal
(Not Used)
.50"
Bore
Ground
Post
Positive
Output
Positive
Output
AC Tap/
Stator
Field
Terminal
Terminal connections on Balmar 98-24-220-BL-IG are shown. Terminal
locations may vary on other 24-volt alternators. See alternator manual
